CN103048330B - The visual sniffer of a kind of surface crack of underwater structure - Google Patents
The visual sniffer of a kind of surface crack of underwater structure Download PDFInfo
- Publication number
- CN103048330B CN103048330B CN201210549322.2A CN201210549322A CN103048330B CN 103048330 B CN103048330 B CN 103048330B CN 201210549322 A CN201210549322 A CN 201210549322A CN 103048330 B CN103048330 B CN 103048330B
- Authority
- CN
- China
- Prior art keywords
- underwater
- sniffer
- visual
- underwater structure
- surface crack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses the visual sniffer of a kind of surface crack of underwater structure, be used in when interference constructing thing does not run and detect its surface crack neatly in real time.The incrustation scale using the collaborative high-pressure water jet of ultrasonic non-destructive cleaning to remove to be attached to underwater structure surface, greasy dirt, liver moss and sucker class are biological thus determine to detect position, underwater camera collection is used to be cleaned place's image, by underwater sound communication mode, image is sent to upper computer end, so that detection personnel observes detection position.This surface crack of underwater structure sniffer by rail plate adjustment cleaning detecting location, or can carry out multimachine networking, the key position under water of the engineering constructions such as long term monitoring dam, drilling platform, avoids newborn crack growth to produce harm.
Description
Technical field
The present invention relates to a kind of fracture detection device, particularly relate to a kind of visual sniffer of surface crack of underwater structure.
Background technology
The underwater structure part of dam, drilling platform is through the operation that works for a long time, and by the impact of water quality, hydraulic pressure and various biochemical factor, crack, disrepair phenomenon appear in its place such as dam body, gate unavoidably.Because construction is under water for a long time, detection, cleaning inconvenience, cause incrusted deposit, various algae shellfish biological attachment is grown, and often can cover again these produced problem hiding.And if micro-cracks, breakage that these initial stages occur can not be repaired in time, its defect level will expand further, and dam gate may be caused to open in time, dam body cannot normally work the catastrophic failure even occurring that large area is caved in.In order to prevent the generation of above-mentioned major accident, the normal method adopted regularly carries out shut-down to dam to safeguard at present, i.e. emptying dam retaining, and by extensive work, personnel are in the action, labor cleaning's dam body attachment, and investigation crack, repairs defect.Although this mode is feasible and respond well, consume a large amount of human and material resources, cost price is high, is not suitable for regular maintenance, is not suitable for popularizing on a large scale.
Underwater structure surface clean can take machinery to beat or the method for ultrasonic cleaning.Not easily grasp for different underwater structure surface covering machinery dynamics of beaing, and it is higher to realize unattended cost.Ultrasonic cavitation is due to ultrasonic physical action in liquid, a certain region in liquid can form the temporary transient negative pressuren zone of local, so produce hole or bubble in a liquid, these bubbles being filled with steam or air are in unsteady state, when they are closed suddenly, shock wave can be produced.Thus very large pressure is produced at local tiny area, thus discharge rapidly in space minimum in a liquid for the sound field energy gathered together, form the physical condition that high temperature (can up to more than 5000K), high pressure (can up to 5 × 10^7pa) and strong shock wave and jet etc. are extreme.Ultrasonic cleaning technique utilizes ultrasonic cavitation effect principle, through years development comparative maturity, has not fragile cleaned material and the low feature of implementation cost.
The operated from a distance control mode of underwater structure is conducive to operating personnel and keeps a safe distance with the underwater structure being in duty, facilitates transfer to safeguard monitoring place, has saved the cost laying telecommunication cable simultaneously.Operated from a distance controls the method can taking airwave communication or underwater sound communication.According to physics principle, radiowave just can be decayed at the very short segment distance of water transmission and be exhausted, and the preservation & testing of underwater structure just must carry out to not affect its normal work in water, is unfavorable for the transmission of radiowave.Underwater sound communication is used in the sound wave that water transmission not easily decays and carries out data transmission, is a technology transmitting data under water.Current water sound communication technique has developed comparatively ripe, has developed into the stage of networking, the data transmission that the operated from a distance being relatively applicable to underwater structure controls.
Summary of the invention
A large amount of human and material resources, time is consumed in order to solve in existing underwater structure maintenance test mode, the problem and whole process construction cannot normally work etc., the invention provides one in conjunction with ultrasonic cleaning and water sound communication technique, can operated from a distance, automaticity high, can the underwater structure surface visualization fracture detection device that normally works of networking, not interference constructing thing
In order to solve the problem, the technical solution used in the present invention is: the visual sniffer of a kind of surface crack of underwater structure, is characterized in that, comprising:
A computing machine being positioned at upper computer end;
One is carried out the first underwater acoustic transducer of underwater sound communication for upper computer end;
One for connecting computing machine and the first underwater acoustic transducer, by the first underwater sound modulator-demodular unit that is to be sent or received signal modulation /demodulation;
The second underwater acoustic transducer carrying out underwater sound communication is held for one for cleaning shooting;
One for connecting the second underwater acoustic transducer, by the second underwater sound modulator-demodular unit that is to be sent or received signal modulation /demodulation;
One is transferred to the ultrasonic signal generator of ultrasonic power amplifier for generation of ultrasound drive signals;
One for driving the high-pressure hydraulic pump of high-pressure water jet shower nozzle;
One for taking the underwater camera of underwater structure surface image;
A core processor be connected with underwater camera for the treatment of plant running data and with the second underwater sound modulator-demodular unit, ultrasonic signal generator, high-pressure hydraulic pump;
Described ultrasonic signal generator connects one for amplifying ultrasound drive signals to drive the ultrasonic power amplifier of ultrasonic cleaning transducer;
Described ultrasonic power amplifier connects one for cleaning the ultrasonic cleaning transducer on underwater structure surface;
Described high-pressure hydraulic pump connects one for rinsing the high-pressure water jet shower nozzle on underwater structure surface.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, it is characterized in that: the first described underwater sound modulator-demodular unit uses FSK modulation demodulation system, and described first underwater sound modulator-demodular unit uses RS232 standard serial port to communicate with the connection of described computing machine.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: the centre frequency of described first underwater acoustic transducer and the second underwater acoustic transducer is respectively 32kHz.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described core processor adopts single-chip microcomputer MSP430F149, uses 3.3V DC-voltage supply.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described ultrasonic signal generator adopts SG3525PWM control chip to produce ultrasound drive signals.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described ultrasonic power amplifier adopts IRFP460N passage, FET type, power MOS pipe to amplify ultrasound drive signals.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described ultrasonic cleaning transducer center operating frequency is 28kHz.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described high-pressure water jet shower nozzle shape is straight tube-like, and end is conic nozzle.
The visual sniffer of aforesaid a kind of surface crack of underwater structure, is characterized in that: described underwater camera adopts cmos sensor, and ultimate resolution is 640 × 800, and maximum withstand voltage anti-water depth is 100 meters, built-in LED light supplement lamp.
The invention has the beneficial effects as follows: due to the visual sniffer of this surface crack possess operated from a distance, automaticity high, can networking, the feature of not disturbing underwater structure normally to work, human and material resources and time is saved compared to traditional maintenance test mode, be applicable to the key position under water with engineering constructions such as long term monitoring dam, drilling platform, avoid newborn crack growth to produce harm.
Accompanying drawing explanation
Fig. 1 is structural schematic block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, the visual sniffer of a kind of surface crack of underwater structure of the present invention, comprises the computing machine 1 being positioned at upper computer end; Also comprise one is carried out underwater sound communication the first underwater acoustic transducer 3 for upper computer end, the centre frequency of described first underwater acoustic transducer 3 is 32kHz.
Also comprise one for connecting the first underwater sound modulator-demodular unit 2 of computing machine 1 and the first underwater acoustic transducer 3, the first described underwater sound modulator-demodular unit 2 uses FSK modulation demodulation system, and described first underwater sound modulator-demodular unit 2 uses RS232 standard serial port to communicate with the connection of described computing machine 1.
Also comprise one is carried out underwater sound communication the second underwater acoustic transducer 4 for cleaning shooting end, the centre frequency of described second underwater acoustic transducer 4 is 32kHz.
Also comprise one for connecting the second underwater acoustic transducer 4, by the second underwater sound modulator-demodular unit 5 that is to be sent or received signal modulation /demodulation.
Also comprising one for generation of ultrasound drive signals is transferred to the ultrasonic signal generator 7 of ultrasonic power amplifier, and described ultrasonic signal generator 7 adopts SG3525PWM control chip to produce ultrasound drive signals.
Also comprise one for driving the high-pressure hydraulic pump 10 of high-pressure water jet shower nozzle, described high-pressure hydraulic pump 10 connects one for rinsing the high-pressure water jet shower nozzle 11 on underwater structure surface, and described high-pressure water jet shower nozzle 11 shape is straight tube-like, and end is conic nozzle.
Described underwater camera 12 adopts cmos sensor for taking the underwater camera 12 of underwater structure surface image also to comprise one, and ultimate resolution is 640 × 800, and maximum withstand voltage anti-water depth is 100 meters, built-in LED light supplement lamp.
Also comprise a core processor 6 be connected for the treatment of plant running data and with the second underwater sound modulator-demodular unit 5, ultrasonic signal generator 5, high-pressure hydraulic pump 10 and underwater camera 12, described core processor 6 adopts single-chip microcomputer MSP430F149, uses 3.3V DC-voltage supply.
Described ultrasonic signal generator 7 connects one for amplifying ultrasound drive signals to drive the ultrasonic power amplifier 8 of ultrasonic cleaning transducer, and described ultrasonic power amplifier 8 adopts IRFP460N passage, FET type, power MOS pipe to amplify ultrasound drive signals.
Described ultrasonic power amplifier 8 connects one for cleaning the ultrasonic cleaning transducer 9 on underwater structure surface, and the center operating frequency of described ultrasonic cleaning transducer 9 is 28kHz.
Principle of work: be connected with first underwater sound modulator-demodular unit 2 of this device by computing machine 1 with data line first on the coast, the first underwater sound modulator-demodular unit 2 connects the first underwater acoustic transducer 3 through long data line and forms upper computer end.Underwater acoustic transducer 3 is placed under water completely.The cleaning of device shooting is held simultaneously and be fixed on underwater guide rail or cable wire and make it press close to underwater structure surface to be detected.As shown in Figure 1, the data transmission procedure of this device is as follows, and the binary electrical signal that computing machine sends is after the first underwater sound modulator-demodular unit 2 is modulated in FSK mode, and being converted to centre frequency by the first underwater acoustic transducer 3 is that the ultrasound wave of 32kHz is launched in water.Be placed in device cleaning shooting end the second underwater acoustic transducer 4 receive the ultrasound wave of water after, acoustic signals is converted into electric signal and sends into the second underwater sound modulator-demodular unit 5, the binary electrical signal demodulated is admitted to core processor 6, and core processor 6 controls the action of ultrasonic signal generator 7, high-pressure hydraulic pump 10, underwater camera 12 respectively according to the instruction represented by the binary electrical signal identified.The image that underwater camera 12 photographs sends to core processor 6 with binary electrical signal form, modulate through the second underwater sound modulator-demodular unit 5 by after its compression, second underwater acoustic transducer 4 sends, first underwater acoustic transducer 3 receives, computing machine 1 is sent into, final display place to be detected image after first underwater sound modulator-demodular unit 2 demodulation.
The visual detection process of surface crack of underwater structure of this device is as follows, first underwater structure surface image acquisition instructions is sent by computing machine 1, core processor 6 controls underwater camera 12 and takes underwater structure surface image after receiving this instruction, pass computing machine 1 back through underwater acoustic channel.Judge whether underwater structure surface exists the coverture affecting fracture detection by operating personnel according to the image of display.If exist, then computer for controlling 1 sends underwater structure surface covering clear instruction, core processor 6 after receiving this instruction first timing controlled ultrasonic signal generator 7 send 28kHz ultrasound-driven electric signal, this signal amplifies rear drive ultrasonic cleaning transducer 9 through ultrasonic power amplifier 8 and works, and carries out ultrasonic cleaning operation.After timing, core processor 6 stops ultrasonic signal generator 7 to work, and timing controlled high-pressure hydraulic pump 10 is started working simultaneously.Current form high-pressure water jet under high-pressure hydraulic pump 10 drives, ejection after high-pressure water jet shower nozzle 11 focuses on, rinse and be ultrasonically cleaned operation emulsification, loosening underwater structure surface covering, reach removing coverture, make the object that underwater structure surface is exposed.After timing, core processor 6 stops high-pressure hydraulic pump 10 to work, and control to return after underwater camera 12 takes underwater structure surface image again, according to image after the cleaning of display on computing machine 1, operating personnel judge whether underwater structure surface exists crack.
The visual sniffer of the surface crack of underwater structure that the present invention relates to adopts separate type, the upper computer end residing for computing machine and cleaning take hold when farthest apart 300 meters can realize real-time action through underwater sound communication and control and image data transmission.For preventing the mutual crosstalk of ultrasound wave, this device to be staggered the time work by its underwater sound communication function of software set and ultrasonic cleaning function, improves the stability of apparatus system.The visual sniffer of multiple stage surface crack of underwater structure possesses networking function, underwater sound communication part on device can be set to communication node pattern, long apart from large area surface crack of underwater structure detection in (being greater than 300 meters) situation to realize.The visual sniffer of the surface crack of underwater structure that the present invention relates to has operated from a distance, characteristic that stability is strong, and whole cleaning, detection process all carry out in liquid environment, when normally can work when not affecting underwater structure, be arranged on its key position for a long time, monitor generation and the expansion trend of its surface crack, timely process, prevents trouble before it happens.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. the visual sniffer of surface crack of underwater structure, is characterized in that, adopts separate type; Comprise:
A computing machine being positioned at upper computer end;
One is carried out the first underwater acoustic transducer of underwater sound communication for upper computer end;
One for connecting computing machine and the first underwater acoustic transducer, by the first underwater sound modulator-demodular unit that is to be sent or received signal modulation /demodulation;
The second underwater acoustic transducer carrying out underwater sound communication is held for one for cleaning shooting;
One for connecting the second underwater acoustic transducer, by the second underwater sound modulator-demodular unit that is to be sent or received signal modulation /demodulation;
One is transferred to the ultrasonic signal generator of ultrasonic power amplifier for generation of ultrasound drive signals;
One for driving the high-pressure hydraulic pump of high-pressure water jet shower nozzle;
One for taking the underwater camera of underwater structure surface image;
A core processor be connected with underwater camera for the treatment of plant running data and with the second underwater sound modulator-demodular unit, ultrasonic signal generator, high-pressure hydraulic pump;
Described ultrasonic signal generator connects one for amplifying ultrasound drive signals to drive the ultrasonic power amplifier of ultrasonic cleaning transducer;
Described ultrasonic power amplifier connects one for cleaning the ultrasonic cleaning transducer on underwater structure surface;
Described high-pressure hydraulic pump connects one for rinsing the high-pressure water jet shower nozzle on underwater structure surface;
First, second described underwater acoustic transducer and ultrasonic cleaning transducer are staggered the time work;
In described device, along with the area of real-time fracture detection increases, the quantity of cleaning shooting end increases, and works with upper computer end networking.
2. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, it is characterized in that: the first described underwater sound modulator-demodular unit uses FSK modulation demodulation system, and described first underwater sound modulator-demodular unit uses RS232 standard serial port to communicate with the connection of described computing machine.
3. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, is characterized in that: the centre frequency of described first underwater acoustic transducer and the second underwater acoustic transducer is respectively 32kHz.
4. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, is characterized in that: described core processor adopts single-chip microcomputer MSP430F149, uses 3.3V DC-voltage supply.
5. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, is characterized in that: described ultrasonic signal generator adopts SG3525PWM control chip to produce ultrasound drive signals.
6. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, is characterized in that: described ultrasonic power amplifier adopts IRFP460N passage, FET type, power MOS pipe to amplify ultrasound drive signals.
7. the visual sniffer of a kind of surface crack of underwater structure according to claim 1, is characterized in that: described ultrasonic cleaning transducer center operating frequency is 28kHz.
8., according to the described visual sniffer of a kind of surface crack of underwater structure arbitrary in claim 1-7, it is characterized in that: described high-pressure water jet shower nozzle shape is straight tube-like, and end is conic nozzle.
9. the visual sniffer of a kind of surface crack of underwater structure according to claim 8, is characterized in that: described underwater camera adopts cmos sensor, and ultimate resolution is 640 × 800, and maximum withstand voltage anti-water depth is 100 meters, built-in LED light supplement lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549322.2A CN103048330B (en) | 2012-12-18 | 2012-12-18 | The visual sniffer of a kind of surface crack of underwater structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549322.2A CN103048330B (en) | 2012-12-18 | 2012-12-18 | The visual sniffer of a kind of surface crack of underwater structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103048330A CN103048330A (en) | 2013-04-17 |
| CN103048330B true CN103048330B (en) | 2015-12-23 |
Family
ID=48061045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210549322.2A Expired - Fee Related CN103048330B (en) | 2012-12-18 | 2012-12-18 | The visual sniffer of a kind of surface crack of underwater structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103048330B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341466B (en) * | 2013-07-29 | 2014-12-17 | 河海大学常州校区 | Multi-frequency switchable underwater construction cleaning and maintenance device |
| CN103556601B (en) * | 2013-11-11 | 2015-10-21 | 河海大学常州校区 | Environment-friendly type underwater structure surface inspection cleaning device |
| CN104301675B (en) * | 2014-09-30 | 2017-07-21 | 杭州电子科技大学 | Gray level image transmission method based on underwater sound communication |
| CN104805800B (en) * | 2015-05-15 | 2017-06-23 | 河海大学常州校区 | Dykes and dams purging system and method for work that ultrasound, cleaning brush, the liquid whistle cooperate |
| CN104818690B (en) * | 2015-05-15 | 2016-08-24 | 河海大学常州校区 | Device and method of work thereof are cleaned in the flaw detection of array underwater structure crack |
| CN104801513B (en) * | 2015-05-15 | 2016-09-28 | 河海大学常州校区 | Liquid whistle jet is worked in coordination with ultrasonic underwater structure and is cleaned device and method of work thereof |
| CN105738364B (en) * | 2015-12-28 | 2018-08-17 | 清华大学深圳研究生院 | Silastic surface algal grown degree measurement method and device based on image procossing |
| CN105954292B (en) * | 2016-04-29 | 2018-09-14 | 河海大学常州校区 | Underwater works surface crack detection device based on the bionical vision of compound eye and method |
| GB2557345B (en) * | 2016-12-08 | 2021-10-13 | Bae Systems Plc | MIMO communication system and data link |
| CN107566808A (en) * | 2017-09-30 | 2018-01-09 | 深圳市智慧海洋科技有限公司 | A kind of underwater image transmission method and system based on wireless water sound communication technique |
| CN110132152B (en) * | 2019-05-29 | 2020-12-25 | 河海大学 | Automatically controlled touring monitoring devices of concrete gravity dam crack under water |
| CN117451681B (en) * | 2023-11-09 | 2024-03-29 | 山东省科学院海洋仪器仪表研究所 | Fluorescent sensor applied to alkylbenzene monitoring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201251554Y (en) * | 2008-07-08 | 2009-06-03 | 武汉理工大学 | Deepwater pier detection device |
| CN102611662A (en) * | 2012-02-14 | 2012-07-25 | 河海大学常州校区 | Underwater acoustic modem with low cost and low power consumption |
| CN102626700A (en) * | 2012-05-07 | 2012-08-08 | 河海大学常州校区 | Ultrasonic cleaning device and ultrasonic cleaning method for underwater structure objects |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2646012B2 (en) * | 1988-09-06 | 1997-08-25 | 運輸省第三港湾建設局長 | Underwater inspection equipment |
| JPH0271138A (en) * | 1988-09-06 | 1990-03-09 | Unyusho Daisan Kowan Kensetsu Kyokucho | Apparatus for inspecting underwater structure |
| JP4607821B2 (en) * | 2006-05-26 | 2011-01-05 | 株式会社日立製作所 | Underwater defect inspection apparatus and underwater defect inspection method |
-
2012
- 2012-12-18 CN CN201210549322.2A patent/CN103048330B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201251554Y (en) * | 2008-07-08 | 2009-06-03 | 武汉理工大学 | Deepwater pier detection device |
| CN102611662A (en) * | 2012-02-14 | 2012-07-25 | 河海大学常州校区 | Underwater acoustic modem with low cost and low power consumption |
| CN102626700A (en) * | 2012-05-07 | 2012-08-08 | 河海大学常州校区 | Ultrasonic cleaning device and ultrasonic cleaning method for underwater structure objects |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103048330A (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048330B (en) | The visual sniffer of a kind of surface crack of underwater structure | |
| CN102607650B (en) | Self-maintenance multi-parameter water quality monitor | |
| CN204042309U (en) | Magnetic hot compound wax control plug removal equipment said by transport pipe | |
| CN104132215A (en) | Acoustic-magnetic-thermal combined paraffin-control and plug-removal method and device for oil pipeline | |
| CN207586187U (en) | The storage tank bottom plate universe detecting system of main passive sound fusion | |
| CN107741728A (en) | A kind of ecology of water information monitoring system | |
| CN114111657B (en) | System for detecting scaling thickness of voltage-sharing electrode and operation method | |
| CN205714170U (en) | Oil well intelligent producing fluid level monitoring device | |
| CN206990812U (en) | A kind of detecting system of U-shaped groundwater supply line clogging failure | |
| CN202994735U (en) | Ultrasonic guided-wave detection system | |
| CN202228067U (en) | Liquid level monitoring device | |
| CN205679598U (en) | Underwater robot water monitoring device | |
| CN103672413A (en) | Method for detecting leakage of inside of tap water pipeline by means of ultrasonic waves | |
| CN104801513A (en) | Underwater building cleaning device with cooperation of liquid-whistle jet flows and ultrasound, and working method of underwater building cleaning devic | |
| CN209689581U (en) | A kind of detection device of sedimentation basin of sewage disposal sludge thickness | |
| CN202010674U (en) | Ultrasonic bottle washer | |
| CN207586182U (en) | The passive sound fusion detection system of storage tank bottom plate distributed wireless master | |
| CN204314458U (en) | The on-line monitoring sonar equipment of solid refuse in a kind of sewage pipe duct | |
| CN205447920U (en) | Controlling cabinet of water circulation hood | |
| CN205562588U (en) | High frequency acoustic monitoring equipment of flood control dam water flow velocity | |
| CN206479149U (en) | One kind dredging steel pipe remote online measuring thickness device | |
| CN202501198U (en) | Sensor assembly used for monitoring leakage of natural gas transmission pipeline | |
| CN209013940U (en) | A kind of scale detection prior-warning device of boiler | |
| CN107473125A (en) | Monitoring assembly and system for FS final spice pushing tow girder | |
| CN209247754U (en) | A kind of environment-friendly type water quality detecting device based on heliotechnics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20181218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |